Egbert f



(No Model.)

R. F. HATFIELD.

GAS PRESSURE REGULATOR.

Patented Oct. 27, 1885.

ATTORNEYS.

N. PETERS. Imam-Lithographer, Wmhingkm. D. Q

of my improved gas-pressure regulators. Fig.

Nl-TFD ROBERT F. HATFIELD,

OF NEXV YORK, N. Y.

GAS-PRESSURE REGULATOR.

SPECEFICATION forming part of Letters Patent No. 329,163, dated October 27, 1885.

Serial No. 158,097. (No model.)

To ctZZ whom it may concern:

Be it known that I, ROBERT F. HATFIELD, of the city, county, and State of New York, have invented a new and useful Improvement in Gas-Pressure Regulators, of which the following is a full, clear, and exact description.

Reference is to be had to the accompanying, drawings, forming a part of this Specification, in which similar letters of reference indicate corresponding parts in both the figures.

Figure l is a sectional side elevation of one 2 is a sectional plan view of a part of the same, taken through the line at m, Fig. 1.

The object of this invention is to improve the construction of the gas pressure regulators for which Letters Patent No. 251,436 were granted to me December 27, 1881, in such a manner as to make them more reliable in operation. The invention consists in the combination, with the inlet-pipe, the cylinder attached to the float, and the cone attached to the inner case of the regulator, of a valve and cylinder rigidly connected with each other and with the said cylinder,whereby the descent of the float will wholly prevent the inflow of gas, as will be hereinafter fully described, and then claimed.

Arepresents the outer case of agas-pressure regulator, the top of which is closed by a cover, B.

O is the pipe through which the gas enters the regulator, and D is the pipe through which the gas passes out of the regulator. The pipes O D are screwed into holes in the bottom of the case A, or in a casting attached to the said bottom, or are otherwise secured to the said bottom with a water-tight connection.

E is the inner case of the regulator,which is made similar in shape to the outer case, A, but with an open bottom and a gastight top. The case E is made smaller than the case A, so as to leave an annular space between the walls of the said cases A E. From the center of the top of the inner case, E, and directly over the upper end of the inlet-pipe O, is suspended a hollow cone, F. \Vith this construction,when the gas enters the case E it raises the said case E against the pressure of the atmosphere, and is put under pressure by the gravity of the said case E, the air passing freely into and out of the space between the cases A E through an opening, B, in the cover B of the said outer case, A. The pressure of the case E upon the gas can be increased and decreased, as required, by placing weights upon and re moving them from the top of the said case E. The gas is prevented from escaping around the lower edge of the case E by keeping the lower part of the case A supplied with Water or other suitable liquid.

In the side of the case, at or a little below the level of the top of the inletpipe O, is formed an opening, A, to serve as an overflow-opening,to prevent the liquid in the case A from rising above the said top of and flowing into the said inlet-pipe O. The opening A,when not in use, is kept closed by ascrew plug or cap, A With this construction, should the liquid in the case A get low, by evaporation or otherwise, the gas will pass around the lower edge of the case E into the case A and escape through the opening B. To guard against this waste of gas, I place a float, G, of sheet metal or other suitable material,around the inlet-pipe C, and arrange it to slide up and down freely upon the said pipe 0 by means of a guide-pipe, G, passing through and attached to the said float, or by other suitable means, as the construction of the said float G may require.

To the top of the float G is attached a hollow cylinder, H, the top of which rises above the upper end of the inlet-pipe O. The upper end of the cylinder H is drawn inward or contracted to form an opening of a less diameter than the interior of the said cylinder, and of such a size and shape as to fit upon the lower part of the hollow cone F. The upward movement of the float G and cylinder His limited by the top of the said float G coming in contact with the annular cap I or other stop attached to the upper end of the inlet-pipe O.

The cap I is so formed as to serve as a seat for the valve J, attached to the lower end of the hollow cylinder K, which is made of such a size as to leave an annular space between it and the cylinder H for the passage of gas. The cylinders H K are connected and held in proper relative positions by webs L, formed upon or rigidly attached to them. The cylinder K terminates at the top at a lower level than the cylinder H, so that the space between the upper ends of the said cylinders will be about the same as between their side walls. The upper end of the cylinder K is so formed as to fit upon the lower part of the cone F.

When sufficient liquid is introduced into the the case A to raise the float G and the cylinders H K and valve J connected with it until stopped by the said float coming in contact with the stop I, the gas escapes from the pipe 0, passes through the spaces between the cylinders H K and the cylinder H and cone F,

which cone has been resting upon the valve J, and enters the case E. As the gas-pressure in the case E increases, it raises the said case E and the cone F connected with it until the said cone F engages with the upper ends of the cylinders H and K and stops the escape of the gas. As the gas-pressure in the case E decreases by the Withdrawal of gas through the outlet-pipe D, the said case E descends, lowering the cone F from the upper ends of the cylinders H K, and again admits gas.

In case the liquid in the case A should get too low, the float G and the cylinder s and valve J descend until the valve J rests upon the upper end of the pipe 0, and prevents any more gas from entering the regulator until the case A has been again supplied with a suitable quantity of liquid, when the operation is the same as hereinbefore described.

By this construction there is obtained a positive closing of the inlet-pipe 0 whenever the liquid in the case Ais lowered in any manner below the line of flotation of the float G, and

an entire stoppage of the inflow of gas is caused until the caseA is again supplied with liquid.

Another advantage of this construction is that the action of the valve formed by the cylinders H and K and cone F is wholly unaffected by differences of pressure inthe inletpipe 0, the said valve being actuated solely by the pressure within the said case E.

The float Q is guided in its up and down movements by the inlet-pipe 0, upon which it fits loosely.

The case E is guided in its up and down movement at the top of the inner cylinder, K, into which the cone F fits loosely, and at the bottom by three or more studs, M, of such a length that their outer ends fit loosely against the inner surface of the outer case, A.

In the side of the upper part of the cone F is formed a small opening, F, to equalize the gas-pressure within and without the said cone.

Having thus described my invention, I claim as new and desire to secure by Letters Patent In a gas-pressure regulator, the combination, with the inlet-pipe G, the cylinder H, attached to the float G, and the cone F, attached to the case E, of the valve J and cylinder K, rigidly connected with each other and the said cylinder H, substantially as herein shown and described, whereby the descent of the float will wholly prevent the inflow of gas, as set forth.

R. F. HATFIELD.

Witnesses:

O. SnneWIoK, E. M. CLARK. 

